designed to fill the place of these ap- | and contrariwise on the head, B’. Now, if the total | graduated face for its regulation, so far as to prevent pendages. The accompanying article was furnished | lifting power of the safety valve, at the end of its|the valve, E (on the under side of which… … rod, C, is hollow throughout, and is ple of the regulator is entirely novel, perforated by the apertures, ccc’ c’, : but everything is simple in construc- and is fitted with the collar, C’, which RIORDAN’S ATTACHMENT TO BOILERS. tion, and the whole arrangement will can be operated as ahand screw.…
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